Alright, let's work through 78389235 times 3499124 step by step
78389235 × 3499124 = 3499124 × (78389235)
+ 3499124 × 5 what gives us 17495620
+ 3499124 × 30 producing 104973720
+ 3499124 × 200 producing 699824800
+ 3499124 × 9000 that equals 31492116000
+ 3499124 × 80000 resulting in 279929920000
+ 3499124 × 300000 producing 1049737200000
+ 3499124 × 8000000 yielding 27992992000000
+ 3499124 × 70000000 giving us 244938680000000

= 274293653530140
